Improvement in tubular gang-saws



J. A. BALCH.

UBULA GANG-SAWS.

' Patented Jan. 16, 1877.

4 BI-0,186,293. r

".PETERS PNOTO-LITHUGRAPHER, WASHINGTONv D. .C,

UNITED STATES PATENT OFFICE,

JAMES A, BALGH, OF EAST PORTLAND, OREGON.

IMPROVEMENT IN .TUBULAR GANG-SAWS.

Specification forming part of Letters Patent No. l86,293, dated January 16, 1877 application filed Math 6, 1876. I

To all whom it may concern;

Be it known that I, JAs. A. BALGH, of East Portland, Oregon, have invented an Improvement in Gang-Saws, of which the following is a specification:

The invention has relation to a novel machine for sawing logs into boards of concavoconvex form, in crosssection to serve as mation, be cut up into a series or nest of concave-convex boards of any desirable length within the limits of the machine.

Referring to the accompanying drawings illustrating my invention, a a, &c., designate a gang of cylindrical or tubular saws secured to a common head, B, and to a shaft, B, which has its bearings at B B and with the saws is arranged in a horizontal position. A designates the frame of the machine, and B B the portion of the latter corresponding to the logcarriage, which need not be particularly described or shown. T represents the log, and S the saw complete.

I am aware that a machine having tubular gang-saws is not, broadly, new; but I am not aware that heretofore any machine has been produced for the specific purpose as mine, namely, the cutting of timber into curved boards of any length or diameter.

The Vmachines already'in use for cutting barrel-staves and fellies will out each but one size of stave or felly, thus occasioning much waste, as well as being altogether unfit for the economical cutting of logs for general use.

The employment of a number ofconcent'ric saws, or even more. than two, is not a mere duplication, since a result is obtained which could not be obtained by two--that is, the

presence of two witnesses.

JAMES ANDERSON BALOH. Witnesses:

KIRK SHELDON,

R. S. POTTER. 

